<template>
  <div>
        <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
        <!-- 警告区域 -->
      <el-alert title="注意：只允许为第三级分类设置相关参数！" type="warning" show-icon :closable="false"></el-alert>
      <!-- 选框区域 -->
      <el-row class="cat_top">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择分类的级联选择框 -->
          <el-cascader v-model="selectedKeys" :options="CateList" expand-trigger="hover" :props="cateProps" @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <!-- 标签页 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addDialogVisible = true">添加参数</el-button>
          <!-- 动态属性面板 -->
          <el-table :data="manyTableData" border stripe>
              <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 动态渲染tag标签 -->
                <el-tag v-for='(item, i) in scope.row.attr_vals' :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                <!-- tag标签输入框 -->
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)"></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">修改</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="isBtnDisable" @click="addDialogVisible = true">添加属性</el-button>
          <!-- 静态属性面板 -->
          <el-table :data="onlyTableData" border stripe>
              <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 动态渲染tag标签 -->
                <el-tag v-for='(item, i) in scope.row.attr_vals' :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                <!-- tag标签输入框 -->
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)"></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">修改</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加对话框 -->
    <el-dialog :title="'添加' + titleText" :visible.sync="addDialogVisible" width="50%" @closed="addDialogClosed">
      <!-- 验证规则 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item label="活动名称" prop="attr_name">
        <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数对话框 -->
    <el-dialog :title="'修改' + titleText" :visible.sync="editDialogVisible" width="50%" @closed="editDialogClosed">
      <!-- 验证规则 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
        <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 分类列表
      CateList: [],
      // 选择的id
      selectedKeys: [],
      // 级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 被激活的标签页
      activeName: 'many',
      // 动态参数数据
      manyTableData: [],
      onlyTableData: [],
      // 控制添加对话框的显示与隐藏
      addDialogVisible: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      // 添加表单的验证规则
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数', trigger: 'blur' }
        ]
      },
      // 控制修改对话框的显示与隐藏
      editDialogVisible: false,
      // 修改参数的表单对象
      editForm: {
        attr_name: ''
      },
      // 添加表单的验证规则
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入参数', trigger: 'blur' }
        ]
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取分类列表
    async getCateList () {
      const { data: res } = await this.$http.get('/categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败!')
      }
      this.CateList = res.data
      console.log(this.CateList)
    },
    handleChange () {
      this.getParamsData()
    },
    // 标签页的点击事件处理函数
    handleClick () {
      this.getParamsData()
    },
    async getParamsData () {
      // 证明选中的不是三级分类
      if (this.selectedKeys.length !== 3) {
        this.selectedKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      // 是三级分类
      console.log(this.selectedKeys)
      console.log(this.activeName)
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }
      // 将其tag标签转换成数组
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })
      console.log(res.data)
      // 对返回的数据进行判断 将数据挂载到动态属性或者静态属性
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      }
      this.onlyTableData = res.data
    },
    // 监听添加对话框 重置表单
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 添加参数
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功1！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 监听修改对话框 重置表单
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮 显示修改对话框
    async showEditDialog (id) {
      console.log(id)
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 修改参数
    editParams () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败！')
        }
        this.$message.success('修改参数成功！')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    // 根据id删除对应参数
    async removeParams (id) {
      const confirmResult = await this.$messagebox.confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 取消了删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      // 删除的逻辑
      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败！')
      }
      this.$message.success('删除参数成功！')
      this.getParamsData()
    },
    // 文本框失去焦点或者按下回车键都会触发
    handleInputConfirm (row) {
      // 去除字符串的空格
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
      }
      // 添加参数
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // 发起服务器请求
      this.saveAttrVals(row)
    },
    // 将对attr_vals的操作保存在数据库
    async saveAttrVals(row) {
      // 发起服务器请求
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        // 将数组拼接为字符串
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败！')
      }
      this.$message.success('修改参数项成功！')
    },
    showInput (row) {
      row.inputVisible = true
    },
    // 根据id 删除tag标签
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    // 判断按钮是否被禁用
    isBtnDisable () {
      if (this.selectedKeys.length !== 3) {
        return true
      }
      return false
    },
    // 获取选择分类的id
    cateId () {
      if (this.selectedKeys.length === 3) {
        return this.selectedKeys[2]
      }
      return null
    },
    // 添加动态对话框值动静态参数显示
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_top {
    margin: 15px 0;
}

.el-tag {
  margin: 10px;
}

.input-new-tag {
  width: 120px;
}
</style>
